THE APPLICATION OF CONTRAM (CONTINUOUS TRAFFIC ASSIGNMENT MODEL) TO PART OF THE BANDUNG ROAD NETWORK

• Main Author: Abbas, Hertono
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/2678
• Institution: Institut Teknologi Bandung

CONTRAM was applied to part of the Bandung network to test whether it was suitable for use under Indonesian conditions. The data required by CONTRAM were measured on site. These were origin - destination demands, network proper-ties and time data such as link length, cruise time, saturation flow and control data for signal junctions. By using CONTRAM, these data were programmed to predict the average speeds, flows, total journey time and total time spent by vehicles on the network during the study period, total travel distances, delays, queues , degree of saturation and total fuel consumption. Some of these outputs were compared with observations from surveys of the actual road network. Test carried out on the Braga - Tamblong - Lembong-Asia Africa network in Bandung showed that CONTRAM gave lower predictions in terms of flows ( 16 percent ) , total time spent ( -6 percent ) and total distance travelled ( -7 percent ) but CONTRAM gave higher values of average straight line speed ( + 3 percent ). Left turning traffic at uncontrolled junctions in CONTRAM took longer times than were measured on the network, probably due to the difference between UK driving conventions and those in Indonesia. The recommended value in the CONTRAM model forthe saturation flow of a give-way link in UK appeared to be too low for Indonesia. It was concluded that CONTRAM could be used in Indonesia, although the modelling of uncontrolled intersections may need revision to take account of Indonesian conditions